Large genealogy database maintained by The Church of Jesus Christ of Latter-day Saints. Anyone may use FamilySearch from home, etc., but additional content is available only when used inside the library. NOTE: Requires creation of a free personal profile.
Access to over 2 billion records from the U.K., Ireland and the British Commonwealth, including census records, military collections, immigration and naturalization records, and the PERiodical Source Index (PERSI).
You can temporarily ask for at-home access to FindMyPast, which is normally only available inside the library. Details here.
Selected popular magazines you can read online from your computer or tablet.
Historical documents and personal histories from the National Archives and other institutions. Includes the Fold3 Holocaust Archives.
UPDATED DETAILS--PLEASE READ
Users inside the library can access the full Foundation Center Online product using the link above.
One-stop source for researching grants and foundations. Includes the Foundation Directory and Foundation Grants to Individuals.
A version of this called "FDO Essentials" will be available via remote access through the end of 2021. Access it here.